Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1251: In analog communication, which multiplexing technique is primarily used?
- A: Time-Division Multiplexing (TDM)
- B: Frequency-Division Multiplexing (FDM)
- C: Code-Division Multiplexing (CDM)
- D: Wavelength-Division Multiplexing (WDM)
View Answer
B
Q1252: What is the primary reason for multiplexing signals in communication systems?
- A: To increase bandwidth usage
- B: To reduce the number of required channels
- C: To improve signal strength
- D: To eliminate noise
View Answer
B
Q1253: Which of the following is NOT an advantage of Frequency-Division Multiplexing?
- A: Allows multiple signals over a single link
- B: Reduces transmission latency
- C: Efficient for analog signals
- D: Requires guard bands between signals
View Answer
B
Q1254: In an FDM system, what prevents signals from interfering with each other?
- A: Amplification
- B: Guard bands
- C: Higher bandwidth
- D: Digital encoding
View Answer
B
Q1255: If each channel in an FDM system requires 10 kHz, and a 2 kHz guard band is needed between adjacent channels, what is the bandwidth required for 5 channels?
- A: 50 kHz
- B: 52 kHz
- C: 54 kHz
- D: 56 kHz
View Answer
C
Q1256: In Frequency-Division Multiplexing, how are signals separated?
- A: By assigning different time slots
- B: By using different frequencies
- C: By encoding them with unique codes
- D: By transmitting them on separate physical links
View Answer
B
Q1257: Which component is essential for demultiplexing FDM signals?
- A: Time synchronizer
- B: Frequency filter
- C: Code generator
- D: Modulator
View Answer
B
Q1258: Fill in the blank: _______ is a technique used by telephone companies to combine multiple signals onto a higher-bandwidth line.
- A: Space-Division Multiplexing
- B: Time-Division Multiplexing
- C: Frequency-Division Multiplexing
- D: Code-Division Multiplexing
View Answer
C
Q1259: What is the main requirement for FDM to be effective?
- A: The bandwidth of the link must be greater than the combined bandwidth of all signals
- B: Signals must be in digital form
- C: Each channel must have a separate transmission medium
- D: The signal must be transmitted in time slots
View Answer
A
Q1260: What is an example of an application that uses Frequency-Division Multiplexing?
- A: Fiber-optic communication
- B: Ethernet networks
- C: AM and FM radio broadcasting
- D: Wireless LAN
View Answer
C